The present invention provides transgenic plants transformed with exogenous nucleic acid encoding a Dunaliella plasma membrane (PM)-ATPase. The transgenic plant has increased tolerance to salt as compared to a corresponding non-transgenic plant. The present invention also provides nucleic acids encoding a chimeric PM-ATPase, which comprise a first portion encoding a plant PM-ATPase or a fragment thereof, and a second portion encoding a Dunaliella PM-ATPase or a fragment thereof. The present invention also discloses a method of producing a transgenic plant having an increased tolerance to salt as compared to a corresponding non-transgenic plant, a method of modifying a plant capacity to survive salt shock, and a method of modifying plant recovery after exposure to salt stress, by introducing into one or more cells of a plant an exogenous nucleic acid encoding a Dunaliella PM-ATPase. Also provided by the present invention are plant cells comprising an exogenous nucleic acid encoding a Dunaliella PM-ATPase, and plant seeds and progeny obtained from the transgenic plants.

 
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